Complete the majority of the game with the Alliance sentinel squad member

Achievement Guide for Sentinel Ally

Achievement won on 10 Dec 07TA Score for this game: 2,057
Posted on 10 September 08 at 01:08

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You get the sentinel, Kaiden, from the start. Keep him in your party to do all the missions and about 40-45 assignments. You should unlock this achievements even before finishing the playthrough since both Kaiden and Ashley are in your party during which you have already done several missions before picking up other potential party members.

Because Kaiden is a sentinel class with both biotic and tech abilities you'll want to balance your party out. You should go for this achievement when you're playing either strictly as a biotic or tech, or are simply a soldier class.

*** Spoiler Alert ***

Toward the end of Virmire you'll need to make a choice to save either Kaiden or Ashley, the two humans originally in your party. Choose Kaiden because you cannot save both.

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